1.方法返回多个结果：返回数组，将多个变量逗号隔开，放在左侧圆括号中
def splitName (fullName) { fullName.split(‘ ‘) } def (firstName, lastName) = splitName(‘Tom Smith‘) println "$lastName, $firstName" /* output Smith Tom */
2.交换变量：将欲交换的变量放在左侧圆括号内，右侧中括号相反顺序放置
def name1 = ‘aaa‘ def name2 = ‘bbb‘ (name1, name2) = [name2, name1] println "$name1, name2" /*output bbb, name2 */
3.使用多赋值：如果有多余的变量，则会设置变量为null
def (String cat, String mouse) = [‘Tom‘, ‘Jerry‘, ‘Spike‘] println "$cat, $mouse" def (first, second, third) = [‘Tom‘, ‘Jerry‘] println "$first, $second, $third" /*output Tom, Jerry Tom, Jerry, null */
原文：http://www.cnblogs.com/ironcrow/p/7244634.html